Enum DataFrameColumnData 

pub enum DataFrameColumnData<'a> {
    Int(&'a [i64]),
    Float(&'a [f64]),
    Str(&'a [String]),
    Bool(&'a [bool]),
    Categorical {
        levels: &'a [String],
        codes: &'a [u32],
    },
    DateTime(&'a [i64]),
}

Typed column data for encode_dataframe.

Each variant borrows the underlying column data for zero-copy encoding.

Variants

Int(&'a [i64])

Column of 64-bit signed integers.

Float(&'a [f64])

Column of 64-bit floats (NaN values are canonicalized during encoding).

Str(&'a [String])

Column of UTF-8 strings.

Bool(&'a [bool])

Column of boolean values.

Categorical

Categorical column with unique level labels and per-row integer codes.

Fields

levels: &'a [String]

The unique category labels.

codes: &'a [u32]

Zero-based indices into levels, one per row.

DateTime(&'a [i64])

Column of datetime values stored as epoch milliseconds (i64).